SCRYPTmail is described as 'Is true end-to-end encrypted email service. Email and meta data, i.e sender / recipient are encrypted when you communicate within scryptmail domain' and is a webmail provider in the security & privacy category. There are more than 25 alternatives to SCRYPTmail, not only websites but also apps for a variety of platforms, including iPhone, Android, Mac and Linux apps. The best SCRYPTmail alternative is Proton Mail, which is both free and Open Source. Other great sites and apps similar to SCRYPTmail are Tuta Mail, mailbox, Posteo and Mailfence.